nashorn jdk buildfile BuildNashorn.gmk still renamed jdk.nashorn.internal.objects package

Recently jdk.nashorn.internal.objects.* classes have been changed to be loaded by extension loader. There is no longer renaming of .class files as .clazz files - so that these are loaded by another per-context loader. But, jdk makefile for nashorn still renames and this results in jtreg test failure with jdk build. We need to address this before out next TL push